I got this tank for my 6 year old daughter. She will be 7 this fall-November. I went ahead and sized up-got her the size 7-8 to be ‘safe’. It is a tad long on her for right now. But, I am glad I sized up. I have not washed it yet but, it may shrink just a tiny tiny bit, not a whole lot I don’t think because the way the material is.Material is very soft and silky like. Moves with you. Stitching is nice. I think this will keep her cool on a Florida trip we are taking late July this year! She likes it and so do I! Quality made.